Power went out, we were running multiple window AC's the night it happened. I came up, plugged in my desktop computer to the outlet (it was unplugged), and powered on the PSU when it went out. There are 5 rooms upstairs, ones out are my room, master bedroom (incl bathroom), and the middle bathroom.

Strangely though, ALL the ceiling fans have lost power, even the ones in the rooms with power still.

My father tested using a voltage tester and can't seem to find the issue. We replaced all the outlets he re-grounded them. We opened some of the ceiling fans up and checked those wires as well but can't find anything wrong at those ends.

Any help?